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Number of Roots of Cubic Function ax^3 + bx^2 + cx + 1 IIT JEE GATE

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Let f(x) = ax3 + bx2 + cx + 1 have extrema at x = p, and q such that, p less than q, pq less than 0 and f(p)f(q) less than 0. Then the equation f(x) = 0 has
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Number of Roots of Cubic Function ax^3 + bx^2 + cx + 1 IIT JEE GATE
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